soft - with plate eyelet

[simone1996]

Good evening to all,
I wanted to ask a question about the springs with "plate" eyelet or however threaded, as from attached photo.
my question essentially is: buying, for example, a traction spring with an inner diameter of 8mm, will it be possible to screw a m8 eyelet?

 

[MassiVonWeizen]

but how is this spring made? from that design you don't understand anything. Where's the filet? Are those holes on top and under the plate where the wire enters?
Do you have a catalogue or something? how do you want to mount a eyelet, a reference would be useful, m8?

 

[simone1996]

then, the spring is cylindrical, the plate eyelet is like in the attached photo (big wheel on the left) and I wondered how to assemble.
while if I have a threaded pin, can it be screwed inside a spring? and therefore, for example, buying a spring with ø inside pairs to 8mm, is it possible to screw a pin m8?
the only "sign" I found is what I put before, I found it on the Modena mill site, and the same design is present on the manual of the machinery organs (niemann).
but catalogs that treat only eyelets I did not find.
referring to pdf I refer to figures a11 and a12. more than this material I couldn't curb.

Thanks again.

http://www.mollificiobergamasco.it/download/mollificio_bergamasco_occhielli3.pdf

 

[meccanicamg]

ask directly to the mill so you can read every doubt.
diameters and steps can be compatible with metric threads but is not said.

 

[MassiVonWeizen]

in that image the mounting is clear. the wire is forced to enter the holes of the plate. in my opinion the term thread is wrong or at least misleading.
maybe a pin can also screw it, but it will hardly be a stable and safe coupling.

 

[meccanicamg]

in that image the mounting is clear. the wire is forced to enter the holes of the plate. in my opinion the term thread is wrong or at least misleading.
maybe a pin can also screw it, but it will hardly be a stable and safe coupling.

in fact it is evident the widest step of the active part of the spring....but it is deformation.

thread a threaded pin into a spring....just think about helicals and how sensitive the thing is in function of step and diameter.... We're talking about two very different things.

What will you really want to know about our user?

 

[exxon]

buying a spring with ø inside pairs to 8mm, is it possible to screw a pin m8?

No.

a m8 screw has 8 mm diameter at the crests of the thread. in a hole diameter 8 mm flows freely.

even if the inner diameter of the spring is correct (around 7 mm), to screw correctly, the step should be the same as the screw (1.25 mm for the screws in big step, the most common) and this would be only by chance. if the step of the resting spring was lower, the same could adapt to that of the screw, but normally the springs have diameter diameter diameter diameter diameter diameter diameter diameter diameter diameters.

admitting also the correct step, the tensile seal would be unpredictable being given by a circular profile on a triangular that would lead the spring to widen if subjected to tensile effort.

I don't think that's a good idea.

 

[simone1996]

My problem is basically to create a hair that can be inserted inside a spring.
so as to realize the coupling as from the enclosed scarabocchio.
It is true that it is unpredictable the speech on the estate, but according to different catalogs it seems to me to be plausible such coupling.

 

[MassiVonWeizen]

If you look, well, the diseges will see that those of the catalogs are not square threaded frames, but are threaded with a special seat to accommodate the spring edge. seat that will have cylindrical shape of the diameter of the spring wire, pitch of the coils and above all an adequate depth to make sure that the spring does not slip.
It's not something that makes you feel like two feet

 

[simone1996]

Okay, thank you very much.
for those threaded plugs, which for me would also be very well, are plugs with a "fillettatura" of the inner diameter of the spring, and are, or should be, commercial.

 

[MassiVonWeizen]

and are, or should be, commercial.

Since you got it from the catalogue of the Modena furniture, I would say that it's easy enough to buy it

 

[exxon]

I've never seen it, and I think it's smart, especially the one in #8 that I'll eventually adopt.

I still have an external collar, just to prevent the coils from expanding and sliding out, I would put it.